CompSci Captchas

vahnx · **Posted:** Sat Apr 09, 2011 7:05 pm

I was wondering if compsci could upgrade to a better capcha service? The current one is very inconvenient and hard to read. I think a more simple two phrase captcha with no scribblings across would be nice. And if spam increases due to that, please find a new way. Thanks.

OJJFQV didn't work

Posted Image, might have been reduced in size. Click Image to view fullscreen.

I got the second one using 99NS21 but it's still very hard to read.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

ProgrammingFun · **Posted:** Sat Apr 09, 2011 7:23 pm

What is this CAPTCHA service called?

Dan · **Posted:** Sat Apr 09, 2011 8:07 pm

If the captcha is easy to read then it will likely be easy for a bot to read.

I could look into reCAPTCHA, however their have been methods to tirck it in the past and the words it produces maybe just as hard to read in some cases (tho proably less offten then what we have now).

Lets see what other users think...

BigBear · **Posted:** Sun Apr 10, 2011 6:13 pm

Capatcha is only used when registering?

I think it is fine unless there is spam then it needs to be improved.

Amailer · **Posted:** Sun Apr 10, 2011 6:14 pm

reCAPTCHA is good, use it.

ProgrammingFun · **Posted:** Sun Apr 10, 2011 7:23 pm

Amailer @ Sun Apr 10, 2011 6:14 pm wrote:

reCAPTCHA is good, use it.

I disagree...when I implemented reCAPTCHA on my school forum, we got attacked by 20 spambots everyday.

I find that the best solution is to set up Q&A: bots usually can't solve math word problems or specific questions.

Tony · **Posted:** Sun Apr 10, 2011 7:36 pm

reCAPTCHA is not necessarily solvable by bots; it's just widely used enough that it's economically feasible to have them be solved by human operators.

Sur_real · **Posted:** Sun Apr 10, 2011 7:40 pm

Yeah I agree, math captcha's are awesome!

http://www.flickr.com/photos/ceejayoz/2674227920/

Source: http://random.irb.hr/signup.php

Tony · **Posted:** Sun Apr 10, 2011 8:02 pm

Use our DWITE setup to get users to solve one of the Q1 level problems, before signing up? Laughing

ProgrammingFun · **Posted:** Sun Apr 10, 2011 8:08 pm

Tony @ Sun Apr 10, 2011 8:02 pm wrote:

Use our DWITE setup to get users to solve one of the Q1 level problems, before signing up? Laughing

YES! That way, everyone would spend 10-15 minutes on the registration page...and it will eliminate noobs and bots Twisted Evil

RandomLetters · **Posted:** Sun Apr 10, 2011 8:56 pm

No, just noobs, since someone will take the time to solve all of them, and put it in a bot Razz

Tony · **Posted:** Sun Apr 10, 2011 9:02 pm

I guess I would have to take a compsci-dedicated bot to be some sort of a compliment...

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